Question

Dada a função f(x) 2x-4 determine
A) x, tal que f(x) =2
B) f(3)
C) f(0)
D) x tal que f(x) =6
E) f(-4)
F) x, tal que f(x) = -2
​

Answer 1

Resposta:

A) f(2) = 0

f(2) 2.2-4

f(2)4-4

f(2) 0

B) f( 3) = 2

f(3) 2.3-4

f(3)6 -4

f(3)  2

C) f(0) = -4

f(0) 2.0-4

f(0) 0-4

f(x) -4

D) f(6) = 8

f(6) 2.6-4

f(6) 12-4

f(6) = 8

E) f(-4) = -12

f(-4) 2.(-4)-4

f(-4) -8 -4

f(x-4) - 12

F) f(-2 ) = -8

f(-2) 2.(-2)-4

f(-2) -4-4

f(-2) -8